zsh has completion for kill, pkill, etc. out of the box. The default for kill is to only shown processes from the current pty, but you can change that with something like:
zstyle ':completion:*:*:kill:*:processes' command 'ps xo pid,user:10,cmd'
I also filter some processes that I almost never want to kill to clean it a bit up:
As with most things in zsh, you can make it as fancy as you want, but this is enough for me.
zsh is really powerful, but the downside is that a lot of these things have a bit of a "magic incantation factor" unless you're pretty familiar with zsh scripting. I guess this is why people use oh-my-zsh and things like that.
Can't have it all I'm afraid. For this reason I keep my zshrc contained to one file so I can easily move it around, but it does require zsh to be available in the first place of course.
All things considered, I'd rather optimize for the 99% of the time I'm on my local machine than the 1% I'm on a remote machine.
Not the person you responded to, but I probably kill an octave or matlab terminal daily. Oops, it turns out this matrix is too big to solve directly. Oops, norm2 takes forever and norm1 would have been good enough.
I suspect they're talking about fzf in general, using `kill` as an example, rather than saying they `kill` stuff often. But I could have misinterpreted their comment.
My own, personal, use-case is to completely nuke `bash-complet*` off my machine.
To me, bash-completion is horrible. I am looking for a tarball to unwind, and I only remember that it it started with "foo-" and it sure did not end in ".tar" (trying to save keystrokes, y'know). Trying C-i does not pull up anything. Argghh. I am on a machine with bash-completion!
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I often hit C-a then "a" to get an invalid command (still saved to my hist), or C-a C-k if I think there is nothing else going into the kill-ring. bash-completion absolutely messes with me.
If it works for You, that is great. I really dislike it.